Bridge-gate



(No Model.)

J. F.'WISTROM.

BRIDGE GATE.

No. 415,011. Patented N01. 12, 1889 UNITED STATES PATENT OFFICE.

J OHAN F. WISTROM, OF CHICAGO, ILLINOIS.

BRIDGE-GATE.

SPECIFICATION forming part of Letters Patent No. 415,011, dated November12, 1889.

Application filed June 18, 1889. $erial No. 314,723. (No model.)

To all whom, it may concern:

Be it known that I, J OHAN F. WISTROM, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Bridge-Gates, of whichthe following is a full, clear, and exact description, that will enableothers to make and use the same, reference being had to the accompanyingdrawings, forming a part of this specification.-

This invention relates to improvements in that class of guard-gates thatare used on swing-bridges in closing the approach to the draw when thebridge is swung.

A practical application of my device is illustrated in the drawings, inwhich Figure 1 is an elevation of the abutment looking from thewater-side,the bridge being open and the gate shown in position to closethe approach; Fig. 2, a similar view showing the relative position ofthe gate and bridge when the latter is closed, the bridge being shown insection.

Referring to the drawings, A represents the bridge-abutment; B, thebridge; 0, the gate, and O C the hand-railing on the respective sides ofthe approach.

The main supporting-frame of the skeleton gate consists of the verticalcentral post D and the two outside bars D D. The lower end of the post Dis inserted in the socketpiece E, the upper end supporting the centerpart of the lower horizontal beam F of the gate proper. The lower endsof the outside framing-bars D D are also inserted in the socket-piece E,and from thence extend upwardly and outwardly in a diagonal plane untilthey reach the point where they are connected by .the respective ends ofthe gatebeam F, when they terminate vertically and are connected by thehorizontal gate-bars aa.

The supporting part of the frame-work is braced with the bars I) b andthe rods dd (Z (Z. The socket-piece E, supporting the gate as a whole,is mounted on the pivot or rock shaft G, j ournaled in the abutment,there being just sufficient space between the abutment and the gate forthe movement of the latter when converted from one position to theother. The counter-weight H is attached to the lower end of socket E,and serves the purpose of antomatically returning the gate from thehorizontal position shown in Fig. 2 to the vertical position illustratedin Fig. 1.

When the bridge is turned from an open to a closed position, the underside, of the same comes in contact with one side of the gate, andgradually turns and holds the gate down until the bridge is again swungopen, when the gate automatically assumes the position for closing theapproach to the draw.

The gate is entirely automatic in operation, simple and durable inconstruction, positive in action, and not at all liable to get out oforder.

Having thus described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is

The combination, with a swing-bridge, of a guard-gate located in thepathway of the respective ends of said bridge and consisting of avertical central post, the diagonal bars, the beam F, the bars a a, thebraces b b, the rods 61 d d d, the weighted socket-piece, and the pivotor rock shaft on which the same is mounted, whereby the opening andclosing of the bridge imparts a corresponding movement to the gate,substantially as set forth.

J OHAN F. WISTROM. \Vitnesses:

' L. M. FREEMAN,

J. B. DONALSON.

